The micro-Nikkor 40mm f/2.8 AFS is one among many micro (macro, whatever; it's the same thing) lens options for someone looking to purchase such a lens. It's a DX lens, which means it's small, light, and cheap. How does it perform? My take on this might surprise you, so read on.
+ small, light, cheap. Just like DX lenses should be
+ great optical performance, no flaws to speak of.
+ 1:1 macro reproduction ratio (but read on)
- ridiculously short working distance. At 1:1 magnification, the front element is 1"/2.5cm or so from the subject!
- No VR. Understandable perhaps, but compared to, say, the micro-Nikkor 85mm f/3.5 VR, it's still a minus.
- ergonomics in general (focus ring, autofocus, etc.) are not very helpful for true macro work.
|Optically it's very, very good. Its shortcomings are related to other issues|